⚖️ Terms of Use & Engineering Disclaimer

Terms of Service & Engineering Disclaimer

Last Updated: November 7, 2026 • Governing the use of ProjectSolar software tools, schematics, and content

1. Acceptance of Terms

By accessing and using ProjectSolar (https://prosolar.app), including our Solar Panel & Battery Calculator, Visual Single-Line Diagram (SLD) Builder, Equipment SRP Catalog, and Engineering Guides, you agree to be bound by these Terms of Service and our Privacy Policy.

2. Electrical Engineering & Sizing Disclaimer

ProjectSolar's calculation engine implements standardized formulas aligned with the Philippine Electrical Code (PEC 2017 Article 6.90), NEC Article 690, and TESDA Solar PV Installation NC II methodologies. However, all outputs generated by this website—including solar array kWp capacity, inverter sizing, LiFePO4 battery autonomy, wire gauges (AWG / mm²), overcurrent circuit breaker ratings, voltage drop indices (VDI), and Single-Line Diagrams (SLDs)—are provided strictly for preliminary engineering feasibility, educational reference, and budgetary planning.

  • No Substitute for On-Site Inspection: Software calculations cannot replace a physical on-site survey conducted by a licensed Professional Electrical Engineer (PEE), Registered Electrical Engineer (REE), or certified structural engineer.
  • Site-Specific Variables: Actual installation requirements depend on roof truss dead-load and wind-load capacity (e.g., NSCP typhoon wind zones), conduit routing, ambient temperature derating inside attics/raceways, main service entrance panelboard busbar ratings, and local Distribution Utility (DU) interconnection rules (such as Meralco, VECO, DLPC, or provincial electric cooperatives).
  • Permitting & Sign-Off: Before purchasing high-voltage DC/AC equipment or energizing any photovoltaic installation, users must obtain formal signed and sealed electrical plans and building permits from a duly licensed electrical engineer in their jurisdiction.

3. Financial ROI & Tariff Projections Disclaimer

Our 25-year cash-flow tables, payback period calculations, Net Present Value (NPV), Internal Rate of Return (IRR), and Levelized Cost of Electricity (LCOE) figures are mathematical projections based on user-supplied inputs and historical averages (such as 0.5%/year solar module degradation and 3.5%/year utility tariff escalation).

  • Actual monthly electricity bill savings vary based on seasonal solar irradiance, local weather patterns, roof shading, panel cleaning maintenance, daytime vs. nighttime appliance usage habits, and utility net-metering export credit rates (e.g., blended generation charges).
  • ProjectSolar does not guarantee specific financial returns or utility bill reductions.

4. Equipment Catalog & Suggested Retail Prices (SRP)

Prices listed on our Equipment & SRP Catalog reflect verified Suggested Retail Prices in Philippine Pesos (₱ PHP) or converted reference currencies at the time of publication.

  • Equipment availability, manufacturer specifications (e.g., Deye, Goodwe, Hopetrek, Luxpower, SRNE, Longi, Phlsolar, LVFU), and retail/VIP pricing are subject to change based on warehouse inventory, shipping logistics, and foreign exchange fluctuations.
  • A binding commercial contract for equipment supply or turnkey EPC installation is formed only upon issuance and mutual execution of a formal written quotation and service agreement following site verification.

5. Intellectual Property & Permitted Use

All original source code, interactive UI components, visual SLD builder assets, engineering articles, and branding on prosolar.app are the intellectual property of ProjectSolar Engineering.

  • Permitted Use: Homeowners, students, electrical engineers, and solar installers are welcome to use the calculator and visual builder free of charge and export PDF proposals or SLD schematics for their personal, academic, or client project evaluations.
  • Prohibited Conduct: You may not scrape, mirror, redistribute, or frame the ProjectSolar web application on unauthorized domains or misrepresent automated software outputs as an officially stamped PEE/REE engineering seal without physical engineering review.

6. Limitation of Liability

To the fullest extent permitted by applicable law, ProjectSolar, its licensed engineers, contributors, and affiliates shall not be held liable for any direct, indirect, incidental, or consequential damages—including equipment damage, electrical faults, fire hazards, structural roof issues, utility interconnection delays, or financial losses—arising from reliance on unverified software estimates or improper DIY electrical installation. Always work with qualified, licensed electrical professionals when handling high-voltage DC solar strings and lithium battery banks.

7. Contact Information

For questions regarding these Terms of Service, commercial EPC engagements, or technical engineering inquiries, please reach out to us at: